<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
  <h1>异步版商品管理系统</h1>
  <a href="/insert.html">增加商品</a>
  <a href="/update.html">修改商品</a>
  <a href="/list.html">查看商品</a>
</body>
</html>